<div id="variants">
<table>
   {% for v in variants %}
   <tr>
       <td> {{v.0|default:""}} </td> <td> {{v.1|default:""}} </td>
       <td> {{v.2}} </td> <td> {{v.3}} </td>
   </tr>
   {% endfor %}
</table>
</div>
